cycle day 37-no period

Savannah • I`m 30. Had baby #1 after 3 years of TTC, 1 year of fertility treatments. Going to try for#2!
I have an almost 7m old baby we were able to have through <a href="https://glowing.com/glow-fertility-program">IVF</a>. She's keeping me very busy, so I've just realized I haven't started my period. I'm currently about 36 days into my cycle. Once my periods came back after giving birth they were clockwork as usual. About 27-28 day cycles.... think it's a fluke I haven't started yet? We would LOVE to have another baby, even better if its natural. I just don't know how likely this could actually be... any others have similar experiences? What were the outcomes?